PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-23:42:30
G03     230.0          65.8                8.8 +/-    1.02       9.5 +/-    1.02  0.040 / 0.040
G09     305.3          20.4                6.5 +/-    1.88      14.2 +/-    1.88  0.040 / 0.040
G14     102.8          11.8                7.1 +/-    2.43      19.1 +/-    2.43  0.040 / 0.040
G16     127.9          61.2               12.1 +/-    0.48      13.6 +/-    0.48  0.040 / 0.040
G22     193.5          52.3               10.5 +/-    0.49      12.9 +/-    0.49  0.100 / 0.260
G23     321.5          51.3                7.8 +/-    1.03       9.7 +/-    1.03  0.140 / 0.330
G26     65.9           51.4                7.7 +/-    1.19       9.5 +/-    1.19  0.110 / 0.220
G31     53.5           18.6                4.1 +/-    3.29       9.4 +/-    3.29  0.100 / 0.170